DISCONTINUED OPERATIONS - Financial Results (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 0	$ 3,205	$ 5,824
Cost of sales	0	2,029	3,943
SG&A	0	397	633
Gain on sale of business	539	13,393	486
Other deductions, net	104	264	81
Earnings before income taxes	435	13,908	1,653
Income taxes	85	2,969	306
Earnings, net of tax	350	10,939	1,347
Climate Technologies
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	0	3,156	4,976
Cost of sales	0	2,000	3,405
SG&A	0	390	514
Gain on sale of business	539	10,610	0
Other deductions, net	104	252	55
Earnings before income taxes	435	11,124	1,002
Income taxes	85	2,315	209
Earnings, net of tax	350	8,809	793
ISE and TOD
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	0	49	848
Cost of sales	0	29	538
SG&A	0	7	119
Gain on sale of business	0	2,783	486
Other deductions, net	0	12	26
Earnings before income taxes	0	2,784	651
Income taxes	0	654	97
Earnings, net of tax	$ 0	$ 2,130	$ 554